13
Screw six Hexagon Socket Head Cap Screws DIN 7984 into the Cover Plate
again:
KLE 60: 4 x M4x12 (bright zinc-plated) and 2 x M4x8 (black)
KLE 80: 4 x M5x14 (bright zinc-plated) and 2 x M5x12 (black)
Tightening torque M4: 3 Nm
Tightening torque M5: 6 Nm
The Cover Plate of the Carriage can only be secured in one position! It is
important to ensure that the holes in the Cover Plate coincide with the threads in
the Carriage and that the gap is symmetrical.
The necessary measurable tensioning axle travel for tensioning the system
corresponds to the distance the tensioning axle moves in the Reverse Unit.
This tensioning axle travel is determined as a function of the load on the KLE.
The following simplified rule of thumb applies for both sizes KLE 8 80x80 and
KLE 6 60x60:
The tensioning axle travel in [mm] corresponds to the profile length in [m]
2x Hexagon Socket Head Cap Screws DIN 7984,
black (under contact plate)
4x Hexagon Socket Head Cap Screws DIN 7984, bright zinc-plated
∆
L = F
Bpre
B
c
spec
Calculating Timing Belt tension
Conventional calculation for checking purposes:
Timing Belt tensioning distance:
Following applies:
F
Bpre
+ F
x
< F
Bperm
and: F
P
> F
x
where: F
x
= m · a+ m ∙ g + F
R
where: Timing Belt tensioning distance
Δ L =
2 ∙ tensioning axle travel [mm]
L
B
=
Total Timing Belt length [mm]
( ≈ 2 ∙ profile length)
F
Bpre
=
Pre-tensioning force for Timing Belt [N]
F
Bperm
= Permissible force for Timing Belt [N]
F
x
=
Operating load [N]
F
F
=
Frictional force [N]
KLE 6 60x60: F
F
≈ 30 N
KLE 8 80x80: F
F
≈ 75 N
c
spec
=
specific spring rate [N]
To correct (shorten) the length of a Timing Belt, move the Carriage backwards
and forwards several times so that the belt teeth can align correctly in the pulleys
of the Reverse Units.
If the Carriage is difficult to move, the teeth are not yet positioned correct-
ly in the pulley of the Reverse Unit.
You can shorten the Timing Belt if necessary by unscrewing the Cover Plate,
shortening the Timing Belt and refitting it. Next, screw the Cover Plate back in
place.
∆
L = F
Bpre
B
c
spec
∆
L = F
Bpre
B
c
spec
∆
L = F
Bpre
B
c
spec
∆
L = F
Bpre
B
c
spec
∆
L = F
Bpre
B
c
spec
∆
L = F
Bpre
B
c
spec
∆
L = F
Bpre
B
c
spec
KLE 6 60x60
KLE 8 80x80
F
Fperm
[N]
1,400
4,500
c
spec
[N]
0.35 ∙ 10
6
1.13 ∙ 10
6
F
x max
[N]
(permissible operating load of
drive unit at v
medium
= 1.5 m/s)
500
1500
Table 7 Timing Belt data
∆
L = F
Bpre
B
c
spec